Unwanted & Hidden alarm

From the past couple days something weird started to happen in my phone Galaxy A50. There's an unwanted and hidden alarm which goes off every morning 7:30 a.m. I can't dismiss it, snooze it or even lower down its volume. I deleted all my alarms cause of this but nothing seems to help. I sleep very late at night and then this alarm goes off every stupid morning it's so annoying and has pissed me off. I checked settings of my phone and found nothing unusual. I am stuck in quarantine I can't even get help from outside. When I discussed this issue with some of my friends and family they were relieved that atleast I am waking up early but imagine yourself in my shoes. Every morning there's an alarm which not only rings but also vibrates violently, wakes you up you can't do anything about it. And now boom, thanx to this **bleep** alarm you can't go back to sleep again. Please help.